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用核磁共振方法(~(13)C-NMR)研究了一系列氯化无规聚丙烯的结构。在0—52.84%(wt)的氯化度范围内,主要为单氯取代,二氯取代很少。伯、仲、叔三种氢的相对氯化活性为R(CH)>R(CH_2)>R(CH_3),并乒表明氯化反应比较均匀地发生在无规聚丙烯分子链上。影响聚丙烯氯化反应的结构因素主要为C—H键的离解能,大分子自由基稳定性和大分子链构型等。
The structure of a series of chlorinated random polypropylenes was investigated by nuclear magnetic resonance (~ (13) C-NMR). Within the range of 0-52.84% (wt), the degree of chlorination is mainly monochloro-substituted and the amount of dichloro-substituted is small. The relative chlorination activities of primary, secondary and tertiary hydrogen were R (CH)> R (CH_2)> R (CH_3), and the results showed that the chlorination occurred more evenly in the random polypropylene chain. Structural factors that affect the chlorination reaction of polypropylene are mainly dissociation energy of C-H bond, stability of macromolecule radical and macromolecular chain configuration.